thumb|right|200px|Title page of Delitiae Musicae Joachim van den Hove (1567? – 1620) was a Flemish/Dutch composer and a lutenist. He composed works for lute solo and for lute and voice. Moreover, he
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d89796d7908abeeced44bcaac514d9a2dcf52d099286e44035640bb9abcb75. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85858f9f-144c-4c0c-b35e-efcb47053ae0.json and https://artists.proofprofile.net/proofs/artist/85858f9f-144c-4c0c-b35e-efcb47053ae0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joachim Van den Hove: Florida, Pavanas, Fantasias and Dances for Lute
Lute Music Of The Renaissance From The Schele Manuscript 1619
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41873d57deb27f325d3077a4c0082cc9e8e62120a655e8921e2b8dbce3771a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA550407956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe50c7113e567f96642c3adc2999b532976db86e8c9df24df7f7f968778374f2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA550407957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032d8cbb2cc43d11239824e3a78724e45b0c638b5a27b3ade6fc9385967b5bf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA550407959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6cef3530158d8e010234116a607c7cb6a86761c18730db9002a320bf056ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA550407960.
Delitiæ musicæ, Pratum musicum longe amoenissimum: Saltarello Englesa & Canarie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8215d2533169fac021a6cccfa9e067fe2f46ce605a771838e5d0ff357c4afe03. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEW741901012.
The Golden Dream (17th Century Music from the Low Countries)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5033a7bad0af862988fa1ba5ff50b98313d03f8bee23eafe4ba5178c31bf363. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM19312306.